1.17: Physical Constants, Units, Del Operator Last updated Nov 20, 2023 Save as PDF 1.16: Astrophysics 1.17.1: Physical Constants Page ID90077 Johan Wevers ( \newcommand{\kernel}{\mathrm{null}\,}\) 1.17.1: Physical Constants1.17.2: Prefixes for Powers of 101.17.3: SI Units1.17.4: The Del-operator